Andrew Koenig, who played Boner on the '80s TV show, has been reported missing

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Former "Growing Pains" star Andrew Koenig, who played Boner on the '80s TV show, has been reported missing.

"He went up to [Vancouver] to visit friends who last saw him on the 14th," Danielle Koenig, his sister, told Zap2it.com, which was first to report the news. "Any information we can get on his whereabouts would be helpful."

Stars including Sarah Silverman, Alyssa Milano and "Best Week Ever's" Doug Benson have Tweeted about his disappearance, with television personality Dave Holmes reporting on his blog that Andrew missed his scheduled February 16 flight back to the U.S.

His parents, Walter ("Star Trek's" original Pavel Chekov) and Judy Koenig, told TMZ that their son was "suffering from depression."

"[He was] not doing good" at the time of his disappearance, they told the site, adding that they planned to fly to Vancouver in the coming days.

According to Walter and Judy, Andrew's phone has been off.

They last had contact with him on February 9.

"I performed with Andrew for several years around Los Angeles," friend and comedian Josh Feemster said in a statement to Access Hollywood. "He always had a passion for comedy and political activism. I really hope he's OK. Not only for his sake, but for the sake of his family and friends."

Individuals with information on the star's location may contact Detective Raymond Payette of the Vancouver Police Department at (604) 717-2534.